Macromotettixoides shengtangshanensis Deng, 2020

Deng, Wei-An, Xin, Lei, Zhang, Rong-Jiao, Huang, Chao-Mei, Xu, Hai-Qing, Tan, Liu-Su & Huang, Su-Qin, 2020, New species and new synonyms of Macromotettixoides (Orthoptera: Tetrigidae) with an updated key, Zootaxa 4852 (1), pp. 41-60 : 54-58

4. Macromotettixoides shengtangshanensis Deng , sp. nov.

( Figures 10–12 )

Type material. Holotype: ♀, China, Guangxi prov., Jinxiu (shengtangshan), 23°58.5999ʹ N, 110°04.4041ʹ E, 1200m alt., 04 July 2018, collected by Wei-An DENG, EMHU . Paratypes. 2♂, 8♀, same data, collected by Wei-An DENG and Xiang-Yi LU, EMHU.

Description. Female. Small size, short, body surface interspersed with granules and sparse protuberances.

Head. Head and eyes not exserted above pronotal surface. Fastigium of vertex short; in dorsal view, width of vertex between eyes 1.4–1.6 times width of compound eye; anterior margin of fastigium slightly concave on both sides of median carina and undulated, slightly surpassing anterior margin of eye; median carina visible anteriorly; lateral margins turned backward; vertex uneven with paired fossulae. In lateral view, frontal ridge and vertex forming a rounded-angle shape, frontal costa distinctly concave between eyes, protruded anteriorly and broadly rounded between antennal grooves. In frontal view, frontal costa bifurcated above lateral ocelli, longitudinal furrow widely divergent between antennae, width of longitudinal furrow of frontal ridge equal to antennal groove diameter, anterior inferior margin of compound eye with a small protuberance.Antennae short, filiform, antennal grooves inserted far below inferior margin of compound eyes, 15-segmented, the 10th and 11th segment are the longest, about 4 times longer than its width. Eyes globose, lateral (paired) ocelli located lowest third of compound eye height.

Thorax. Pronotum with slightly tectiform and slightly coarse dorsum; slightly swollen between shoulders and interspersed with sparse coarse protuberances and carinae; posterior half of pronotal disc with many net-like wrinkles and notchs. Pronotum with truncate anterior margin; median carina slightly lamellar and entire, slightly undulated or nearly straight or slightly arch-like in profile; lateral carinae of prozona parallel; humeral angle obtuse, interhumeral carina absent; hind pronotal process wide, reaching apex of hind femur and its apex narrowly rounded. Lower margin of hind process curved, lateral carinae of metazona curved too, width of the area between the two is 0.8 mm. Posterior angles of lateral lobes produced outwards, end of posterior angles slightly truncate, posterior margins of lateral lobes of pronotum only with ventral sinus. Tegmina and hind wings absent.

Legs. Fore and middle femora slightly compressed, margins finely serrated, with carinated and distinctly undulated ventral margins. Hind femora robust and short, 2.3 times as long as wide; with carinated and margins smooth, postmedian of lower outer carina of hind femora with two unconspicuous projections; antegenicular denticles and genicular denticles acute. Outer side of hind tibia with 6–7 spines, inner side with 4–5 spines. Length of first segment of posterior tarsi slightly longer than third, three pulvilli of first segment of posterior tarsi: first and second very small and apices acute, third large and apices right angle.

Abdomen. Ovipositor narrow and long, length of upper valvulae 3.6 times its width, upper and lower valvulae with slender saw-like teeth. Length of subgenital plate nearly equal to its width, middle of posterior margin of subgenital plate triangular projecting.

Coloration. Body dark brown; antennae brown and the terminal segment black. Hind femur dark brown. Hind tibia dark brown, with two light rings in the middle.

Male. Similar to female, but smaller and narrower. Width of vertex between eyes 1.3 times width of compound eye. Subgenital plate short, cone-shaped, apex bifurcated.

Measurements (mm). Length of body: ♂ 6.5–7.0, ♀ 7.0–7.5; length of pronotum: ♂ 6.0–6.5, ♀ 7.0–7.5; length of hind femur: ♂ 4.0–5.3, ♀ 4.5–4.8.

Diagnosis. New species can be easily distinguished from other species of the genus by anterior margin of fastigium of vertex undulated. New species is similar to Macromotettixoides undulatifemura Deng, Zheng & Yang, 2012 from which it differs in width of vertex between eyes 1.4–1.6 times width of compound eye in female (width of vertex between eyes 2.0 times width of compound eye in female in M. undulatifemura ); anterior margin of fastigium of vertex undulated (anterior margin of fastigium of vertex straight in M. undulatifemura ); pronotum between shoulders interspersed with sparse coarse protuberances and carinae (pronotum between shoulders smooth in M. undulatifemura ); postmedian of lower outer carinae of hind femora with two projections (lower outer carina of hind femora smooth in M. undulatifemura ); lower carinae of hind femora smooth (lower carinae of hind femora with 5–6 small teeth in M. undulatifemura ).

Etymology. The new genus was named after the type locality, Shengtangshan, Jinxiu, Guangxi, China; adjective.

Distribution. P. R. CHINA: Guangxi.

Figures

FIGURE 10. Macromotettixoides shengtangshanensis Deng, sp. nov., holotype female. (A) body, lateral view; (B) the same, dorsal view; (C) head and anterior part of pronotum, dorsal view; (D) the same, lateral view; (E) head, frontal view.

FIGURE 11. Macromotettixoides shengtangshanensis Deng, sp. nov., holotype female. (A) left fore femur, lateral view; (B) left mid femur, lateral view; (C) left hind femur, lateral view; (D) left hind femur, dorsal view; (E) left hind tibia, lateral view; (F) left posterior tarsus, lateral view; (G) ovipositor in lateral view; (H) subgenital plate of female, ventral view.

FIGURE 12. Macromotettixoides shengtangshanensis Deng, sp. nov., paratype male: (A) body, dorsal view; (B) body, lateral view.